(;
AB[gb][fb][gd][fd][ed][dc][cc][cd][ce][cg][eb][bc]
AW[cb][db][dd][gc][hb][hc][hd][he][fc][ec][ba]
C[Black plays.

Source:
    Variation from a tsumego collection from Go Seigen.

Analysis:
    Myron Souris]
(;
B[ea]
C[Ensures that White doesn't make a gain in the corner.]
(;
W[bb];B[da]
(;
W[ab]
C[Best for both sides.];
B[ga];W[ha];B[ac]
C[Black turns the corner into a gote seki.]
)
    (;
    W[ga]
    C[Inferior];
    B[ab];W[ha];B[ac];W[fa];B[aa];W[ca];B[eb]
    C[Both Black and White capture a few stones, but Black makes some corner territory.]
    )
)
    (;
    W[ga]
    C[Fails];
    B[bb];W[ca];B[ab];W[ha];B[aa]
    )
)
    (;
    B[da]
    C[Risky];
    W[ea];B[fa];W[bb];B[ha];W[ia]
    C[White can start a big ko.];
    B[ib]
    C[White takes the ko 1st, and also has internal ko threats along the top edge to the right.]
    )
    (;
    B[bb]
    C[Fails];
    W[ea]
    )
)

